Yikes, that's a bit more than I bargained for, but I guess I should've known when attempting to upgrade a 6 year old computer. The reason I mentioned photoshop was because when attempting to modify pictures I often get error messages telling me that my memory is too low. I assumed a video card with a higher memory would fix this problem.
Thanks for the advice and the links, though. If I find an extra $525.00 laying around, I may take your advice.